TY - JOUR
T1 - Designing a novel low-density, high-strength Al12Nb25.5Ta8.5Ti27.5Zr26.5 refractory high-entropy alloy for medium-temperature applications
AU - Naseer, Hashim
AU - Wang, Yangwei
AU - Bao, Jiawei
AU - Khan, Muhammad Abubaker
AU - Afifi, Mohamed A.
N1 - Publisher Copyright:
© 2024 Elsevier Inc.
PY - 2025/1
Y1 - 2025/1
N2 - This study introduces a novel Al12Nb25.5Ta8.5Ti27.5Zr26.5 Refractory High-Entropy Alloy (RHEA), designed for medium-temperature structural applications while addressing the density problem and strength-ductility trade-off in RHEAs. The alloy was synthesized using vacuum arc melting (VAC) and characterized through comprehensive experimental methods including X-ray diffraction (XRD), scanning electron microscopy (SEM) with attached energy dispersive spectroscopy (EDS), and transmission electron microscopy (TEM). This RHEA demonstrated exceptional mechanical properties, achieving a yield strength of 1301 MPa and a specific yield strength of 188.5 MPa·g−1·cm3 at room temperature, with notable ductility (compressive strain >69 %) across a wide temperature range up to 1000 °C.The microstructural analysis revealed a two-phase BCC/B2 nanodomain structure that contributes significantly to its strength and ductility from 20 °C to 600 °C.
AB - This study introduces a novel Al12Nb25.5Ta8.5Ti27.5Zr26.5 Refractory High-Entropy Alloy (RHEA), designed for medium-temperature structural applications while addressing the density problem and strength-ductility trade-off in RHEAs. The alloy was synthesized using vacuum arc melting (VAC) and characterized through comprehensive experimental methods including X-ray diffraction (XRD), scanning electron microscopy (SEM) with attached energy dispersive spectroscopy (EDS), and transmission electron microscopy (TEM). This RHEA demonstrated exceptional mechanical properties, achieving a yield strength of 1301 MPa and a specific yield strength of 188.5 MPa·g−1·cm3 at room temperature, with notable ductility (compressive strain >69 %) across a wide temperature range up to 1000 °C.The microstructural analysis revealed a two-phase BCC/B2 nanodomain structure that contributes significantly to its strength and ductility from 20 °C to 600 °C.
KW - Compressive yield-strength
KW - Mechanical properties
KW - Microstructural analysis
KW - Refractory high-entropy alloy
UR - http://www.scopus.com/inward/record.url?scp=85211073991&partnerID=8YFLogxK
U2 - 10.1016/j.matchar.2024.114602
DO - 10.1016/j.matchar.2024.114602
M3 - Article
AN - SCOPUS:85211073991
SN - 1044-5803
VL - 219
JO - Materials Characterization
JF - Materials Characterization
M1 - 114602
ER -